IRI

IRI may refer to:

* The Islamic Republic of Iran
* Internationalized Resource Identifier, a generalization of the Uniform Resource Locator (URL), a World Wide Web resource allowing the use of Unicode
* International Roughness Index, a dimensionless quantity used for measuring road roughness, proposed as a world standard by the World Bank

Businesses and organizations:
* Intellectual Reserve, Inc., a legal entity of The Church of Jesus Christ of Latter-day Saints
* International Republican Institute, a U.S. federal budget funded institution involved with national political parties around the world
* Istituto per la Ricostruzione Industriale, an Italian industrial public group
* International Research Institute for Climate and Society, Columbia University based organization focusing on climate risk management
* International Resistance Initiative/Initiative de résistance internationaliste, a group claiming responsibility for two acts of sabotage in Québec in 2004 and 2006